Final answer:
Homeostasis is the biological process that maintains stable internal conditions within an organism's body, necessary for survival and proper function, despite external environmental changes.
Step-by-step explanation:
The regulation and maintenance of an organism's internal conditions, keeping them steady is known as homeostasis. This essential biological process allows organisms to maintain stable internal conditions, such as temperature and pH levels, necessary for survival, regardless of external environmental changes. Homeostatic regulation involves various systems within the body, which work together to maintain these conditions within a narrow, optimal range. For instance, mechanisms like shivering or sweating help regulate body temperature, while other processes ensure that nutrient levels and waste removal are effectively managed to sustain life. Homeostasis is dynamic, requiring constant adjustments to stay at or near a set point, which is crucial for an organism's overall function and health.